<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>HTML常用元素练习</title>
</head>
<body>
    <h1>HTML常用元素练习</h1>
    <h2>结构元素</h2>
    <p>常用的结构元素有body、nav、h1、h2、....</p>
</body>
</html>